Puyang Cleanway Chemicals Co., Ltd., founded in 2001, is a company specializing in the production of water treatment materials. Its main products include trichloroisocyanuric acid, sodium dichloroisocyanurate, cyanuric acid, etc. Besides a large number of domestic orders, the company's products are also exported to the European Union, Southeast Asia, South America and other places and receive a good market response. As all know, production lines of various water treatment materials require the stable heat source, so the boiler system with high quality and sufficient output is very important for the water treatment material manufacturers. After having a deep understanding of ZOZEN's quality and strength, Cleanway Chemicals quickly signed the contract to buy the SZS series gas-fired steam boiler.
Shandong Yuwang Ecological Food Industry Co., Ltd. is a large-scale non-GMO soybean protein production and raw material processing base in China. Its products include the non-GMO soybean oil, soybean meal, soybean protein isolate, soybean protein concentrate, soybean dietary fiber and protein power. In the processing of soybean protein, sterilization, concentration, flash evaporation and dehydration processes require the superheated steam with higher temperature and quality, so as to ensure the high nutritional value of Yuwang brand soybean protein isolate. With high-efficiency steam output and high-quality high-temperature steam, ZOZEN SZS series superheated steam boiler successfully won the favor of Yuwang Eco.
Since the beginning of 2020, with the support of county government, Luanchuan County Thermal Energy Co., Ltd. has continuously improved the heating equipment and service quality to promote the central heating business in Luanchuan County. In September of 2020, the company organized the public bidding for the second phase of the central heating boiler room project in Luanchuan County. The company planned to introduce a set of energy-efficient gas-fired hot water boiler and clearly required that the NOx emission concentration of the hot water boiler should be less than 30mg/Nm3. This time, due to the high thermal power and good environmental protection performance of the SZS series gas-fired hot water boiler, ZOZEN Boiler successfully won the bid.
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The main purpose of spraying membrane water wall boiler is to prevent the boiler water wall from being corroded by high temperature and prolong its service life. Spray anti-wear and anti-corrosion coating on water-cooled wall pipes, and cover the surface of corroded components with corrosion-resistant isolation layer to separate metals from these media for surface protection.
The operation of the boiler will produce gas, and the chemicals in it will inevitably cause certain corrosion to the water wall tubes of the membrane water wall boiler, which will lead to the decline of the effective bearing capacity of the boiler, reduce the safety of the boiler and directly affect the normal operation of the boiler.
1. The high temperature corrosion of membrane water wall boiler tube will make the tube wall thinner, about 1 mm per year. This phenomenon will not only cause serious hidden danger of safe operation, but also increase the workload of temporary maintenance and overhaul of boiler, resulting in great economic waste.
2. Due to the corrosion of the water wall, it is likely to cause a sudden explosion accident of the water wall tube, leading to an emergency shutdown and maintenance, which will not only disrupt the normal heating order and affect the normal heating, but also greatly increase the labor intensity of workers and the extra maintenance costs, which will directly affect the lives of employees and the benefits of enterprises.
Only by understanding the purpose of membrane water wall boiler spraying can we correctly understand the importance of boiler water wall spraying. In addition, the following points should be paid attention to when spraying the boiler water wall:
1. The plasticity and thermal expansion of the coating material should be able to adapt to the internal environment of the boiler and the desulfurization device, otherwise it is easy to delaminate in use;
2. Electroplating or hot infiltration plating can be carried out, which has good coverage and bonding degree, but in field tailor welding, the coating will have weak links due to technical reasons, which will reduce its performance;
3. Thermal spraying can also be carried out. This method is very suitable for on-site operation, and can provide a variety of performance coatings, and can additionally protect the unprotected parts of existing equipment or re-protect the protected parts.
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